The sketcher on https://crystallography.io/ offers templates to accelerate drawing the structure to query. In contrast to other sketchers, however, the current implementation tends to coalesce these unexpectedly early.
For example, aiming to extend a methyl-substituted cyclohexane by a second cyclohexane at the tip of the methyl group yields decalin instead. So far, the only approach I identified to prevent this to happen was 1) to sketch to separate cyclohexane rings, and then 2) to drag an extended single bond between the two:
Apparently, cyclohexane is not the only template with this property. With benzene, for example, the sketcher suggests a napthalene-like entity. The search in the database possibly does not account for the bond order between the atoms, yet may yield a pentavalent carbon atom. Again, this may be prevented by drawing the cycles separately, and to join them by a dragging a single bond:
Joining rings not over tips, but along an edge in common, however works along the expected way for e.g., both cyclohexane (to yield decalin), or benzene (to yield a naphthalene with the usual bond orders).
sketchers_magnetism.zip
The sketcher on https://crystallography.io/ offers templates to accelerate drawing the structure to query. In contrast to other sketchers, however, the current implementation tends to coalesce these unexpectedly early.
For example, aiming to extend a methyl-substituted cyclohexane by a second cyclohexane at the tip of the methyl group yields decalin instead. So far, the only approach I identified to prevent this to happen was 1) to sketch to separate cyclohexane rings, and then 2) to drag an extended single bond between the two:
Apparently, cyclohexane is not the only template with this property. With benzene, for example, the sketcher suggests a napthalene-like entity. The search in the database possibly does not account for the bond order between the atoms, yet may yield a pentavalent carbon atom. Again, this may be prevented by drawing the cycles separately, and to join them by a dragging a single bond:
Joining rings not over tips, but along an edge in common, however works along the expected way for e.g., both cyclohexane (to yield decalin), or benzene (to yield a naphthalene with the usual bond orders).
sketchers_magnetism.zip